let track2; // loop

let vehicle; 

let speed = 0.5; // vehicle speed

let startX = 0; // initial position.x

let startY = 0; // initial position.y

let sizeX = 20; // ellipse size.x

let sizeY = 20; // ellipse size.y

let t = 0;

​

function setup() {

  createCanvas(400, 400);

  track1 = [

    createVector(width/2, height/2),

    createVector(0, height/2 - 160),

    createVector(0, height/2 + 160),

    createVector(width/2, height/2),

  ]

  track2 = [

    createVector(width/2, height/2),

    createVector(width, height/2 - 160),

    createVector(width, height/2 + 160),

    createVector(width/2, height/2),

  ]

  vehicle = new Vehicle(startX, startY, sizeX, sizeY, speed, t, true);

}

​

function draw() { 

  background(119,221,119);

  // infinite loop creation

  stroke(255);

  strokeWeight(5);

  noFill();

  bezier(track1[0].x, track1[0].y, track1[1].x, track1[1].y, track1[2].x, track1[2].y, track1[3].x, track1[3].y);

  bezier(track2[0].x, track2[0].y, track2[1].x, track2[1].y, track2[2].x, track2[2].y, track2[3].x, track2[3].y);

  if (vehicle.left) {

    // move on left track

    vehicle.Move(track1[0], track1[1], track1[2], track1[3]); 

  } else {

    // move on right track

    vehicle.Move(track2[0], track2[1], track2[2], track2[3]);

  }

  vehicle.Show();

}